Portable furnace.



PATENTED DEG.31, 1907.

G. E. RUHMANN. PORTABLE FURNAUB.

APPLICATION FILED AU.G.13. 1907.

wi h1 @aseo GUSTAVE E. RUHMANN, or soHuLENBURe, TEXAS.

PORTABLE ruRNAcE.

To all whom 'it may concern.' l

Be it known that I, GUsTAvE E. RUR- MANN, citizen of the United States, residin at Schulenburg, in the county of Fayette an State of Texas, have invented new and useful Improvements in Portable Furnaces, of which the following is a specification.

My invention pertains to furnaces and more particularly to portable furnaces for use in` combination with pots and kettles; and it consists in the peculiar and advantageous portable furnace hereinafter described ,and particularly pointed out in the claims appended.

In the drawings, accompanying and forming part of this specification: Figure 1 is a front elevation showing the furnace constii' tuting the preferred embodiment of my invention, and also showing a kettle as properly positioned in and supported by the furnace. Fig. 2 is a vertical, -cross section, taken in t e plane indicated by the line 2-2 of Fig. 1. Fig. 3 is an inverted plan view of the furnace, showing the flue strip thereof and the relation of said strip to a kettle. Fig. 4 isa detail elevation, on an enlarged scale, illustrating the manner in whichthe flue strip is connected to the casing of the furnace.

Similar letters designate corresponding parts in all ofthe views of the drawings, referring to which:

A is what is known as a sugar kettle, and B is the casing of my novel furnace. The said casing B is preferably, though not necessarily, made of sheet steel, is circular in forni, and is tapered or gradually reduced in diameter toward its upper end, whereby it is adapted to fit plain makes of cast-iron wash pots or sugar kettles of various sizes. In its front portion the casing B is provided with an opening B for the introduction of fuel, which openin1 is-controlled by a door C; and the casing is urther provided at a point be# low the opening B with a plurality of aper tures D designed to admit sufficient air to properly support. combustion.

Leading from the upper portion of the casing B at a point diametrically opposite the opening B is-an u take E which may be of the construction il ustrated or of any other construction compatible with the purpose of my invention.

F is a flue strip arranged in the casing B and extending through more than half of a Circle and disposed with its ends at opposite Specification of Letters Patent. .Application inea August-13.1907. 'seal No. 388.349.

Patented Dec. 3 1, 1907.

- sides of the opening B. The said iiue strip is arranged close against and disposed at an a proximate right angle tothe inner side of t e casing B and is carried by angular brackets G having depending arms H. In these depending arms H are slots I through which and the casing B extend bolts J which have nuts K at their inner ends. l

As will be readily understood by reference to Figs.' 1 and 2 of the drawin s, the flue strip F is susceptible vof being a justed vertically and adjustably i'ixed at various heights, and from this it follows that the flue for the upward conduct oie-products of combustion against the potV or kettle in casF ing B may be arranged in accordance with the size of the pot or kettle and the position the same occupies in casing B. In other words, the flue strip F may be located as desired relative to the potvor kettle in the casing B to determine the size of the flue for the upward passage of products' of combustion from the lower portion of casing B to the smoke outlet.

In the ractical'use of my novel furnace, a fire is bu' t and maintained in the lower portion of the casing B, when, as will be readily understood, the products of combustion will pass rearward and upward, and bringin up against the flue strip F will be defiecte inward against the pot or kettle, and will then pass u ward between the iiue strip and the pot or ettle to the smoke pipe.

As will be readily gathered from the foregoing, my novel furnace may be conven iently moved from place to place, and is simple and inexpensive in construction and yet well adapted to withstand the rough usage to which portable furnaces are ordinarily subjected.

'The construction herein shown and described constitutes the best embodiment of my invention at present known to me, but it is obvious that in the future practice of the invention such changes ormodiications may be made as fairly fall within the scope of my invention as defined in the claims ap- Pended. f

Havin described my invention, what I claim an desire to secure by Letters-Patent, 1s:

1. The combination in a furnace, of a casing having an inlet in its lower portion ffir the admission of air lto support combustion, a smoke conduit leading from the u per portion of the-casing at a point opposite to the l said inlet,and a flue strip ieiitending ixlyward air inlet; the said flue strip being connectedvv with and arranged to be adjusted bodily up.'

at an angle from the inner side ofthe easing and valso extending around the inner side o the casin from a point above and at one side of an adjacent to 'the air inlet to afpoint at the opposite side of and ad'acent to said and down on the casing.

' door controlling the saine and a a point at one side 20 2. The combinationin afurnace, of a cas` Iing tapering or gradually diminished in diameter upward andhaving an o lening and a so having an inlet for air dis osed below said opening, a smoke conduit eading from the-upper portion of the casin at a oint opposite saidv opening and air et, an a ue strip extending around the inner side of the casing fromot and adjacent to thetion of the casing ing tapering or 4g1 :ad1'1ally diminished in dii ameter upward and having an o door "controlling the saine anda o having an inlet for airl dis o'sed below said opening, a

smoke" conduit eading from the upper porat a point opposite said opening and airlnlet, a uestmp extending around vthe inner side of the casin from a point at one side of and adjacent to t e o en-v mg to a point at the Vopposite side of an ad.

jacent to said opening and disyosed at an angie to the casing, angular brac to the said flue stri and havingdepen ing, slotted armsand bo ts extending through the slots of the bracket arms and the casing and and ue stri may be adjustably iixed at various heig ts. l

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses. 'f

' GUSTVE ERUHMANN. Witnesses:

CH. BAMGARTEN, E. R. Voer.

equiped With nuts, whereby both brackets.

ets connected 

